Automatic sample injector for preparative chromatography

Abstract

An automatic sample injector for preparing chromatograms comprises a sample containing cylinder, a sample lowering cylinder, a sample lowering cylinder side groove, a pressing sliding piece, a sliding containing cylinder, a circular stop block, a vertical sliding rod, a spring and a fixing block, a sample containing cylinder lower pipe is arranged on the lower portion of the sample containing cylinder, and the sample containing cylinder lower pipe is matched with the sample lowering cylinder; the sample containing cylinder lower pipe is inserted into the sample lowering cylinder, the side face of the sample lowering cylinder is provided with a sample lowering cylinder side groove, the lower portion of the sample lowering cylinder is provided with a sample lowering cylinder lower head, the sliding containing cylinder is matched with the sample containing cylinder, the sliding containing cylinder is inserted into the sample containing cylinder, and the sliding containing cylinder slides in the sample containing cylinder. The upper surface of the sliding containing cylinder is attached to the lower surface of the sample containing cylinder lower pipe, a sliding containing cylinder side opening is formed in the side face of the sliding containing cylinder and is opposite to the sample lowering cylinder side groove, a strip-shaped sliding groove is formed in the side face of the sample lowering cylinder, and the pressing sliding piece is provided with a pressing sliding piece side sliding block.

Description

Technical Field

[0001] The utility model relates to the field of preparative chromatography, in particular to an automatic sample injector for preparative chromatography. Background Art

[0002] The existing patent (Announcement No.: CN216926713U) proposes an automatic sampler for liquid chromatograph, including a sample injection tube, wherein the lower end of the sample injection tube is provided with a sample injection needle and a protective component, and the protective component is located on the outer wall of the sample injection needle. The automatic sampler for liquid chromatograph described in the utility model, through the provided protective component, after the injection is completed, the rotating block is rotated based on the fixed block, and then the first protective shell and the second protective shell are rotated, so that the two cleaning components are sleeved on the outer wall of the sample injection needle, and when the first protective shell and the second protective shell overlap based on the four magnetic blocks, the four magnetic blocks are magnetically attracted to each other to achieve fixation, and the sample injection needle can be cleaned by the cleaning component at this time. The lower end of the sample injection tube of this device is provided with a sample injection needle, but the sample injection tube does not have a quantitative injection structure, and the amount of each injection cannot be quantitatively controlled. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides an automatic sampler for preparing chromatography, which uses a spring as a guide to a vertical slide bar and a fixed block as a basis to apply an upward thrust to a sliding holding tube, so that the sliding holding tube moves upward when the pressing slide is released, so that the side opening of the sliding holding tube is staggered with the side groove of the sample lowering tube. At this time, the sample in the side groove of the sample lowering tube enters the chromatograph downward from the bottom of the sample lowering tube, and the amount of sample injected each time is the same.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] An automatic sample injector for preparing chromatograms comprises a sample holding tube, a sample lowering tube, a sample lowering tube side groove, a pressing slide, a sliding holding tube, a circular stopper, a vertical slide bar, a spring, and a fixed block. The lower part of the sample holding tube has a sample holding tube lower tube, the sample holding tube lower tube is adapted to the sample lowering tube, the sample holding tube lower tube is inserted into the sample lowering tube, the side of the sample lowering tube has a sample lowering tube side groove, the lower part of the sample lowering tube has a sample lowering tube lower head, the sliding holding tube is adapted to the sample holding tube, the sliding holding tube Insert the sample holding tube, the sliding holding tube slides in the sample holding tube, the upper surface of the sliding holding tube fits with the lower surface of the lower tube of the sample holding tube, the side of the sliding holding tube has a sliding holding tube side opening, the side opening of the sliding holding tube is opposite to the side groove of the sample lowering tube, the side of the sample lowering tube has a strip slide groove, the pressing slide has a pressing slide side slider, the pressing slide side slider is adapted to the strip slide groove, the pressing slide side slider is inserted into the strip slide groove, the pressing slide side slider slides in the strip slide groove, and the pressing slide side slider is connected to the sliding holding tube.

[0006] The inner side surface of the pressing slide fits with the outer side surface of the sample placing tube, the fixed block is connected to the sample placing tube, the lower part of the vertical slide rod is connected to the fixed block, the spring is sleeved on the vertical slide rod, the lower part of the spring is against the fixed block, and the bottom of the sliding holding tube is provided with a vertical slide rod socket, the vertical slide rod is adapted to the vertical slide rod socket, the vertical slide rod passes through the vertical slide rod socket, and the vertical slide rod slides in the vertical slide rod socket. Beneficial Effects

[0007] 1. The utility model fills the sample holding tube with samples, inserts the lower tube of the sample holding tube into the sample lowering tube, so that the samples in the sample holding tube can flow downward into the sample lowering tube, and the sliding holding tube is placed inside the sample lowering tube. The sliding holding tube receives the samples flowing down from the sample holding tube, and the sliding slider on the side of the slide is pressed to pass through the strip slide groove to connect the sliding holding tube. The sliding slider on the side of the slide can be operated on the outside of the sample lowering tube to adjust the position of the sliding holding tube in the sample lowering tube, and at the same time, the sliding slider on the side of the slide is pressed to axially position the sliding holding tube to ensure that the sliding The side opening of the holding cylinder corresponds to the side groove of the sample lowering cylinder. During the use of the chromatograph, the two are axially misaligned. The pressing slide can be pressed downward to slide the sliding holding cylinder downward until the sliding block on the pressing slide slides to the bottom of the strip slide groove. At this time, the sliding holding cylinder is opposite to the side groove of the sample lowering cylinder, and the bottom of the sliding holding cylinder is below the opening of the side groove of the sample lowering cylinder. During the use of the chromatograph, the sample that flows into the side groove of the sample lowering cylinder from the sliding holding cylinder directly flows out from the side groove of the sample lowering cylinder, and the sample that flows out from the side opening of the sliding holding cylinder fills the inside of the side groove of the sample lowering cylinder with a certain amount.

[0008] 2. The utility model fixed block is fixed inside the sample lowering cylinder, the lower part of the vertical slide bar is connected to the fixed block, the vertical slide bar passes through the vertical slide bar jack, the spring uses the vertical slide bar as a guide and the fixed block as a basis to exert an upward thrust on the sliding holding cylinder, so that the sliding holding cylinder moves upward when the pressing slide is released so that the side opening of the sliding holding cylinder is staggered with the side groove of the sample lowering cylinder. At this time, the sample in the side groove of the sample lowering cylinder enters the chromatograph downward from the lower head of the sample lowering cylinder, and the amount of injection each time is the same. The limit card block is inserted into the limit card block slide groove, and the limit card block axially positions the sliding holding cylinder to ensure that the axial direction remains unchanged when the sliding holding cylinder moves up and down. When using this device, the lower head of the sample lowering cylinder is inserted into the injection port of the chromatograph. Each time injection is required, the pressing slide is directly pressed. It is easy to use, and the sample can be volatilized in a closed space during the use of the chromatograph. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The utility model is a top view of an axonometric diagram of an automatic sample injector for preparing chromatography.

[0010] Figure 2 The utility model is a bottom-up axonometric view of an automatic sample injector for preparing chromatography.

[0011] Figure 3 This is a cross-sectional view of the first state of an automatic sample injector for preparing chromatography described in the utility model.

[0012] Figure 4 This is a cross-sectional view of the second state of an automatic sample injector for preparing chromatography described in the utility model.

[0013] Figure 5 This is a top sectional view of the sliding containing cylinder and the vertical sliding rod described in the utility model.

[0014] Figure 6 This is an axonometric view of the sample lowering tube described in the utility model. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below according to the accompanying drawings and embodiments:

[0016] Embodiment 1:

[0017] An automatic sample injector for preparing chromatograms, comprising a sample holding cylinder 01, a sample lowering cylinder 03, a sample lowering cylinder side groove 05, a pressing slide 07, a sliding holding cylinder 09, a circular stopper 11, a vertical slide bar 12, a spring 14, and a fixing block 15. The lower part of the sample holding cylinder 01 is provided with a sample holding cylinder lower tube 02, the sample holding cylinder lower tube 02 is adapted to the sample lowering cylinder 03, the sample holding cylinder lower tube 02 is inserted into the sample lowering cylinder 03, the sample holding cylinder 01 is filled with sample, the sample holding cylinder lower tube 02 is inserted into the sample lowering cylinder 03, so that the sample in the sample holding cylinder 01 can flow downward into the sample lowering cylinder 03 3, the side of the sample lowering tube 03 is provided with a sample lowering tube side groove 05, the lower part of the sample lowering tube 03 is provided with a sample lowering tube lower head 04, the sliding holding tube 09 is adapted to the sample holding tube 01, the sliding holding tube 09 is inserted into the sample holding tube 01, the sliding holding tube 09 is placed inside the sample lowering tube 03, the sliding holding tube 09 receives the sample flowing down from the sample holding tube 01, the sliding holding tube 09 slides inside the sample holding tube 01, the upper surface of the sliding holding tube 09 is in contact with the lower surface of the sample holding tube lower tube 02, the side of the sliding holding tube 09 is provided with a sliding holding tube side opening 10, and the sliding holding tube side opening 10 is in contact with the sample holding tube 01. The sample lowering cylinder side groove 05 is opposite, and the pressing slide 07 can be pressed downward to make the sliding holding cylinder 09 slide downward until the pressing slide side slider 08 slides to the bottom of the strip slide 06. At this time, the sliding holding cylinder 09 is opposite to the sample lowering cylinder side groove 05, and the bottom of the sliding holding cylinder 09 is below the opening of the sample lowering cylinder side groove 05. During the use of the chromatograph, the sample that flows into the sample lowering cylinder side groove 05 from the sliding holding cylinder 09 directly flows out from the sample lowering cylinder side groove 05, and the sample that flows out from the sliding holding cylinder side opening 10 fills the inside of the sample lowering cylinder side groove 05 with a certain amount. The side of the sample lowering cylinder 03 has a strip slide 06. Pressing The slide 07 has a pressing slide side slider 08, which is adapted to the strip slide groove 06. The pressing slide side slider 08 is inserted into the strip slide groove 06, and the pressing slide side slider 08 slides in the strip slide groove 06. The pressing slide side slider 08 is connected to the sliding holding tube 09. The pressing slide side slider 08 allows the position of the sliding holding tube 09 in the sample lowering tube 03 to be operated from the outside of the sample lowering tube 03. At the same time, the pressing slide side slider 08 axially positions the sliding holding tube 09 to ensure the correspondence between the side opening 10 of the sliding holding tube and the side groove 05 of the sample lowering tube, so that the two are axially misaligned during the use of the chromatograph.

[0018] Embodiment 2:

[0019] The inner side surface of the pressing slide 07 described in the utility model fits with the outer side surface of the sample placing tube 03, the fixed block 15 is connected to the sample placing tube 03, the fixed block 15 is fixed inside the sample placing tube 03, the lower part of the vertical slide bar 12 is connected to the fixed block 15, the spring 14 is sleeved on the vertical slide bar 12, the lower part of the spring 14 is against the fixed block 15, and the bottom of the sliding holding tube 09 is provided with a vertical slide bar socket 13, the vertical slide bar 12 is adapted to the vertical slide bar socket 13, the vertical slide bar 12 passes through the vertical slide bar socket 13, and the vertical slide bar 12 slides in the vertical slide bar socket 13.

[0020] Embodiment 3:

[0021] The upper part of the spring 14 of the utility model is against the bottom of the sliding holding cylinder 09, and the spring 14 is guided by the vertical slide bar 12 and based on the fixed block 15 to apply an upward thrust to the sliding holding cylinder 09, so that the sliding holding cylinder 09 moves upward when the pressing slide 07 is released, so that the side opening 10 of the sliding holding cylinder is staggered with the side groove 05 of the sample lowering cylinder. At this time, the sample in the side groove 05 of the sample lowering cylinder goes downward from the lower head 04 of the sample lowering cylinder into the chromatograph, and the amount of each injection is the same. The sliding holding cylinder 09 has a limit block 16, and the side of the vertical slide bar 12 has a limit block slide groove 17. The limit block 16 and the limit block slide groove 17 Correspondingly, the limit block 16 is inserted into the limit block slot 17, and the limit block 16 axially positions the sliding holding tube 09 to ensure that the axial direction remains unchanged when the sliding holding tube 09 moves up and down. The limit block 16 slides up and down in the limit block slot 17, and the upper part of the vertical slide rod 12 is connected to the circular stopper 11, and the lower surface of the circular stopper 11 fits with the sliding holding tube 09. There is a sample in the sample holding tube 01. When this device is used, the lower head 04 of the sample lowering tube is inserted into the injection port of the chromatograph. Each time the sample needs to be injected, just press the slide 07. It is easy to use, and the sample can evaporate in the use of the chromatograph in a closed space.

[0022] Embodiment 4:

[0023] The installation steps of the utility model are as follows: first connect the fixed block 15 to the sample holding tube 01, connect the lower part of the vertical slide bar 12 to the fixed block 15, put the spring 14 on the vertical slide bar 12, insert the sliding holding tube 09 into the sample holding tube 01, pass the vertical slide bar 12 through the vertical slide bar insertion hole 13, insert the limit card block 16 into the limit card block slide groove 17, connect the upper part of the vertical slide bar 12 to the circular stopper 11, pass the pressing slide side slider 08 through the strip slide groove 06 to connect the sliding holding tube 09, put the sample into the sample holding tube 01, and insert the sample holding tube lower tube 02 into the sample lower tube 03.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. An automatic sample injector for preparing chromatography, characterized in that : It comprises a sample holding tube (01), a sample lowering tube (03), a sample lowering tube side groove (05), a pressing slide (07), a sliding holding tube (09), a circular stopper (11), a vertical slide bar (12), a spring (14), and a fixing block (15). The lower part of the sample holding tube (01) comprises a sample holding tube lower tube (02), the sample holding tube lower tube (02) is adapted to the sample lowering tube (03), the sample holding tube lower tube (02) is inserted into the sample lowering tube (03), the side of the sample lowering tube (03) comprises a sample lowering tube side groove (05), the lower part of the sample lowering tube (03) comprises a sample lowering tube lower head (04), the sliding holding tube (09) is adapted to the sample holding tube (01), the sliding holding tube (09) is inserted into the sample holding tube The sample holding tube (01) comprises a sample holding tube (01), a sliding holding tube (09) sliding in the sample holding tube (01), an upper surface of the sliding holding tube (09) fitting with a lower surface of the sample holding tube lower tube (02), a side surface of the sliding holding tube (09) comprising a sliding holding tube side opening (10), the sliding holding tube side opening (10) being opposite to a side groove (05) of the sample holding tube, a side surface of the sample holding tube (03) comprising a strip slide groove (06), a pressing slide (07) comprising a pressing slide side slider (08), the pressing slide side slider (08) being adapted to the strip slide groove (06), the pressing slide side slider (08) being inserted into the strip slide groove (06), the pressing slide side slider (08) sliding in the strip slide groove (06), and the pressing slide side slider (08) being connected to the sliding holding tube (09).

2. An automatic sample injector for preparing chromatography according to claim 1, characterized in that The inner side surface of the pressing slide (07) is fitted with the outer side surface of the sample lowering tube (03), the fixing block (15) is connected to the sample lowering tube (03), the lower part of the vertical slide rod (12) is connected to the fixing block (15), the spring (14) is sleeved on the vertical slide rod (12), the lower part of the spring (14) is against the fixing block (15), the bottom of the sliding holding tube (09) has a vertical slide rod socket (13), the vertical slide rod (12) is adapted to the vertical slide rod socket (13), the vertical slide rod (12) passes through the vertical slide rod socket (13), and the vertical slide rod (12) slides in the vertical slide rod socket (13).

3. An automatic sample injector for preparing chromatography according to claim 2, characterized in that The upper part of the spring (14) abuts against the bottom of the sliding holding tube (09), the sliding holding tube (09) has a limit block (16), the side of the vertical slide rod (12) has a limit block slide groove (17), the limit block (16) is adapted to the limit block slide groove (17), and the limit block (16) is inserted into the limit block slide groove (17).

4. An automatic sample injector for preparing chromatography according to claim 3, characterized in that The limit block (16) slides up and down in the limit block slide groove (17), the upper part of the vertical slide rod (12) is connected to the circular stopper (11), the lower surface of the circular stopper (11) is in contact with the sliding holding tube (09), and the sample holding tube (01) has a sample in it.

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